#container{
    margin: 0;
    padding: 0;
    position: relative;
    left: 0;
    top: 0;
    background-color: white;
    border: 5px white solid;
    overflow: hidden;
    text-align: center;
}

.hidden-btn{
    line-height: 100%;
    width: 30px;
    height: 100%;
    font-size: 100%;
    color: white;
    background-color: black;
    border:none;
    position: absolute;
    z-index: 1;
    top: 0;
    opacity: 0;
}

button{
    outline: none;
}

.hidden-btn:hover{
    opacity: 0.8;
}

#last-btn{
    left: 0;
}

#next-btn{
    right: 0;
}

#imgs{
    padding: 0;
    margin: 0;
    border: none;
    list-style: none;
}

#imgs li{
    height: 100%;
    margin: 0;
    display: inline-block;
}

img {
    margin: 0;
    padding: 0;
    border: none;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.img-a{
    margin: 0;
    width: 100%;
    height: 100%;
    border: none;
    padding: 0;
}

#btns{
    display: block;
    margin: 0 auto;
    padding: 0;
    border: none;
    background: none;
    transform: translate(0,-100%);  
}

#btns li{
    display: inline-block;
    padding: 0;
    outline: none;
    border: none;
    background: none;
    margin: 0;
}

#btns button{
    display: block;
    border:none;
    width: 10px;
    height: 10px;
    margin: 0 5px;
    padding: 0;
    border-radius: 5px;
}

.active{
    background-color: orange;
}

.not-active{
    background-color: grey;
}
